<template>
  <el-container class="home_container">
    <!--头部-->
    <el-header>
      <!--黑马头像-->
      <div>
        <img src="../assets/picture/heima.png" />
        <span>****系统</span>
      </div>
      <!--退出按钮-->
      <el-button type="info" @click="logout" class="btns">退出</el-button>
    </el-header>

    <!--页面主题区域-->
    <el-container>
      <!--侧边栏-->
      <el-aside :width="isCollapde ? '64px' : '180px' ">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          :collapse="isCollapde"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
          ><!--
            1.unique-opened  :设置展开时只保持有一个子菜单展开的设置:
            2.:collapse="isCollapde"   是否折叠，isCollapde为true和false
            3.:collapse-transition="false"   是否有展开的动画
            4.:router="true"    路由跳转
            5. :default-active="activePath"   设置点击高亮
          -->
          <!--一级菜单-->
          <el-submenu :index = "item.id+''" v-for="item in menuList" :key="item.id">

            <!--一级菜单的模板区域-->
            <template slot="title" >
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>

            <!-- 二级菜单 -->
            <el-menu-item :index = "'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-location"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>

          </el-submenu>
        </el-menu>
      </el-aside>

      <!--右侧内容主体-->
      <el-main>
        <!--路由占位符-->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      menuList: [],
      iconsObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      //是否折叠
      isCollapde: false,
      
      //被激活的链接地址
      activePath: ''
    }
  },
  created() {
     this.getMenuList();
     this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    
  async getMenuList() {
    const {data: res} = await this.$http.get("menus");
    console.log(res);
    if(res.meta.status != 200) return this.$Message.error(res.meta.msg);
    this.menuList = res.data;
  },

  toggleCollapse() {
    this.isCollapde = !this.isCollapde;
  },

  saveNavState(activePath) {
    window.sessionStorage.setItem('activePath',activePath)
    this.activePath = activePath
  }
  },
};
</script>

<style lang="less" scoped>
.home_container {
  width: 100%;
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding: 8px;
  align-items: center;
  color: white;
  font-size: 16px;
  div {
    display: flex;
    align-items: center;
    span {
      margin-left: 10px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.btns {
  width: 66px;
  height: 39px;
}
span {
  margin-left: 6px;
}
.toggle-button {
  background-color: #4a5064;
  line-height: 23px;
  font-size: 10px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>